21556 ÷ 5 = 4311 R1
We're going to perform division on 21556 with 5 as the divisor.

Step 1:
5 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 5

Step 2:
5 goes into 21 4 times with a remainder of 1.
Write down 4 as next digit of of the result. 
Result so far: 4
Subtract 20 from 21 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 5

Step 3:
5 goes into 15 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 43
Subtract 15 from 15 to get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 5

Step 4:
5 goes into 5 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 431
Subtract 5 from 5 to get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 5

Step 5:
5 goes into 6 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 4311
Subtract 5 from 6 to get 1.

The final result is 4311 with a remainder of 1.